package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
@Slf4j
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);
        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void add(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();

        BeanUtils.copyProperties(employeeDTO,employee);

        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        employee.setStatus(StatusConstant.ENABLE);

        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);
    }

    @Override
    public PageResult findPage(String name, Integer page, Integer pageSize) {

        PageHelper.startPage(page,pageSize);

        Page<Employee> employees = (Page<Employee>) employeeMapper.selectByName(name);

        return new PageResult(employees.getTotal(),employees.getResult());
    }

    @Override
    public Employee findById(Long id) {
        return employeeMapper.selectById(id);
    }

    @Override
    public void updateById(EmployeeDTO employeeDTO) {

        Employee employee = new Employee();

        BeanUtils.copyProperties(employeeDTO,employee);

        employee.setUpdateUser(BaseContext.getCurrentId());
        employee.setUpdateTime(LocalDateTime.now());

        employeeMapper.updateById(employee);

    }

    @Override
    public void updateStatus(Integer status, Long id) {
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .build();

        if (status == 0) {
            status = 1;
        } else {
            status = 0;
        }
        employeeMapper.updateStatus(employee);
    }

    @Override
    public String updatePassword(PasswordEditDTO passwordEditDTO) {
        Long id = passwordEditDTO.getEmpId();
        String newPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes());
        String oldPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());

        Employee employee = employeeMapper.selectById(id);

        String password = employee.getPassword();

        if (oldPassword.equals(password)) {
            LocalDateTime updateTime = LocalDateTime.now();

            Long updateUser = BaseContext.getCurrentId();

            employeeMapper.updatePasswordById(id,newPassword,updateTime,updateUser);
            return null;
        }
        return MessageConstant.PASSWORD_ERROR;
    }

}
